Stops logging tweets and directly jumps to hashtags.
Will se later for an efficient way to save tweets too.
Probably a way that doesnt require database.
Removes small bug finding duplicates where there is none.

Also removes print statement from data.py
Creates indexes to enhance searches in table .
Also activates logging on mysql to look at queries and try to correct if
possible.
Modifies code so that Indexes are really taken into account.

Tested full night without increasing CPU load.